Many misconceptions in this tread.
1) Sig mags and Glock mags cost NEARLY THE SAME. Mecgar P226 18rd $19-25. GLock mag, $20-25? Explain to me, where is the price difference? Better deals are out there, look harder.
2) If your sub compact Glock out shoots your X-Five, it is your damn failure. Like saying a mini van is faster than a Nascar race car, well only if the Nascar is driven by a monkey. :banghead:
3) All this talk on ergonomics and grip angles are all personal preference. Everybody has different hand sizes and shapes. Like saying a size 34 pants is better than a size 32 pants. Makes no sense. :banghead:
4) NO, and NO, AND NO, you cannot ALMOST buy 2 Glocks for the price of 1 Sig. Math is not hard. Again, better deals are out there, look harder.
5) OP's friend wants a platform for HOME DEFENSE. Yea, like I'm going to worry about the weight of my pistol when there's an intruder coming at me.
6) DA/SA is 'inconsistent,' really? Have you guys own a DA/SA? How many times do you actually have to fire the gun in DA? Yea, sorry, I'd take the Sig SA trigger over the Glock's 'consistent' trigger any day.
7) Glock take down is much easier than Sig. Now are you just being lazy? Because I cannot think of what good I can do with that ONE extra second other than lighting a fart.
8) 'Gun 1 is more accurate than gun 2.' Wrong. The only thing that makes a gun inaccurate, in this case Sig vs Glock, is the user. Again, this is for the purpose of home defense, so a .00001 inch difference at 7 yard is really going to make or break the bad guy?
9) Just because it costs more does not make it better. Just because it costs less does not make it better.
10) Just because a LE agency is using X gun does not make X gun more accurate or reliable than Y gun. More importantly, Just because a LE agency is using X gun does not mean a civillian will magically become efficient with X gun over Y gun.
All that can be summarized into one phrase : choose what fits you better.
ATK.